Programmer and sysadmin (DevOps?), wannabe polymath in tech, science and the mind. Neurodivergent, disabled, burned out, and close to throwing in the towel, but still liking ponies 🦄 and sometimes willing to discuss stuff.

  • 1 Post
  • 224 Comments
Joined 1 year ago
cake
Cake day: June 26th, 2023

help-circle












  • Rather the opposite: simplifying this down to an issue of just an AI introducing some BS, flattens out the problem that grifter journals don’t follow a proper peer review process.

    introducing bias or false information in highly specialized fields

    Reviewers are not perfect, and may miss things

    It’s called a “peer review” process for a reason. If there are not enough peers in a highly specialized field to conduct a proper review, then the article should stay on arxiv or some other preprint server until enough peers can be found.

    Journals that charge for “reviewing” BS, no matter if AI generated, or by a donkey with a brush tied to its tail, should be named and shamed.

    We already have countless examples of this in science where a study with falsified data or poor methodology breeds a whole field of research which struggles to validate the original studies and eventually needs to be retracted.

    …and no AI was needed. Goes to show how AI is the red herring here.


  • Vibration has two components: frequency, and intensity.

    The brain is “floating” in cerebrospinal fluid, so your question can be deconstructed into two parts: how much of that vibration would the fluid transmit, and how would brain cells react to the resultant internal vibration.

    We know that high intensity vibration can cause the skull to directly hit the brain, and/or compress the fluid to a point where just the pressure can start causing brain damage. I think you can find the (mostly) safe limits in OSHA regulations.

    With high enough frequency vibrations, you could induce cavitation in the fluid, making it behave like an ultrasonic cleaner. That could start popping brain cells like balloons. Don’t do that. You might search ultrasound imaging equipment frequency and intensity limits, to have an idea of what is safe.

    If it’s low frequency and intensity, that “we would consider safe”… there is no reason for it to not be safe, for the brain. That doesn’t mean it would be equally safe for other structures not floating in cerebrospinal fluid, like eyes, ears, teeth, the whole skull, muscles, spine, neck blood vessels, and similar. Cells are elastic to some degree, much more than bone, so soft tissues are less likely to get damaged by “safe” vibrations.

    If you strapped a tiny vibrator to a head, there shouldn’t be any damage to the brain. One kind of such “vibrator” that many people use, is headphones. You could probably check the energy output of most toy vibrators with a dB meter for a rough comparison.

    Strapping a head to a road vehicle… would depend on the vehicle’s shock absorbers, but there is a reason why seats usually have some additional cushioning on them.

    If you want to check on some more extreme vibration limits, look at NASA’s manned rocket launch parameters. They aren’t pleasant, yet are limited so to not cause damage. (Don’t look at fighter jet limits, those are a tradeoff between “getting shot down” vs “some brain damage”).



  • The only known way to convert 100% of matter into photons, is a matter-antimatter annihilation. You are bound to encounter some antimatter over enough light years of travel, but it isn’t clear whether it would be enough to annihilate all your matter, and the ship’s matter (there doesn’t seem to be too much antimatter out there).

    At some much earlier point though, you’re going to receive such an amount of high energy radiation, that the whole ship and its occupants, are going to turn into a ball of plasma… including the engines, so no more accelerating from there on.

    That ball of plasma is going to collide with interstellar dust at quite high speed/energy levels, just like in a collider, with the particles breaking apart and creating a cascade, of photons and other particles, that will quickly decay and/or coalesce into other ones.

    So you will become a photon, even a lot of photons, and while some would escape in random directions, the plasma cloud would dissipate and slow down over some distance, becoming mostly interstellar dust itself.


  • That’s interesting. May I ask you a few questions?

    Why are you storing in the gas phase?

    Some temperature spiking is normal, but it should not exceed the glass transition temperature of about -130°C.

    Glass transition of what, the samples? Sample containers? …?

    “one-fill all-fill” (OFAF) to work. OFAF fills all tanks sequentially once any one triggers the process.

    What are the benefits of that?

    From the usage graphs, why does it seem like Tank 1 is using the most nitrogen, even though Tank 3 is getting accessed the most? Shouldn’t Tank 3 have higher losses?